Performance is very good with the new Intel Skylake processor, although it's a modest increase over Haswell.

The new Bluetooth keyboard, mouse, and trackpad are improved and rechargeable now.

CONS

The port placement at the back of the iMac is a nuisance and hasn't been addressed. Also, it lacks Thunderbolt 3 and USB Type-C ports.

Base models include a performance-killing mechanical hard drive. Nearly every reviewer highly suggests upgrading to either Apple's Fusion drive or an SSD.

The integrated graphics performance is just average.

Apple’s late 2015 update to the 27-inch 5K iMac adds more color support to the display and moves to Intel’s latest Skylake processors. CPUs start with a 3.2 GHz quad-core i5 and go up to a 4.0 GHz quad-core i7. The 5K display has a resolution of 5,120 x 2,880 pixels and is driven by an AMD Radeon R9 GPU. RAM starts at 8GB and can be user-upgraded to 32GB. The ports include two Thunderbolt 2 ports, four USB 3.0 ports, Gigabit Ethernet, an SDXC card slot, and a headphone jack. The iMac comes with a rechargeable Magic Keyboard and Magic Mouse 2.

Whenever a new Apple system is released into the market, it is hard not to get caught up in the rhetoric, but the Apple iMac MK462LL/A 27-In…

Whenever a new Apple system is released into the market, it is hard not to get caught up in the rhetoric, but the Apple iMac MK462LL/A 27-Inch Retina 5K (2015) silences critics by offering some finer things that nobody else has: a class-leading desktop with unparalleled 5K screen.

... what Apple didn’t announce was the ability to use these 5K Retina iMacs as an external display using Target Display mode. Checking the c…

... what Apple didn’t announce was the ability to use these 5K Retina iMacs as an external display using Target Display mode. Checking the company’s support site, it turns out Apple updated its Target Display documentation the following day, confirming that none of the 2015 iMacs support the feature.